<div class="panel panel-primary">
  <div class="panel-heading">NgModel演示</div>
  <div class="panel-body">
    <p class="text-denger">ngModel只能用在表单类元素</p>
    <input [(ngModel)]="currentRace.name">
    <p>{{currentRace.name}}</p>
  </div>
</div>